One of the best explanation I ever see in my life without words.
@patty9285
4 жыл бұрын
Geoscience student here. This was super helpful - helped visualize formation. Thanks!
@pranithreddy4939
4 жыл бұрын
Video speaks more than 1000 words....... Great
@rajatmishra7868
2 жыл бұрын
Incomparable ! Thanks for the help. 😁
@Daring_Dragon165
Жыл бұрын
This was super useful for my geography homework, thank you!
@xilo7185
5 жыл бұрын
randall carlson brought me here. mentioned JohnShaws work on drumlins. good videos!
@laxminarayansinghlodhi8072
3 жыл бұрын
Amazing , Short , sweet and unbeatable Explanation
@paulw8090
5 жыл бұрын
Thanks brother, you helped my life. I write a Seminararbeit about this😮
@Willy_Tepes
26 күн бұрын
So it is literally caused by flowing water. You don't need ice in this model. Such drumlins can be found all over the Earth, even where there have never been glaciers.
@toms751
4 жыл бұрын
Thanks “The glaciers formed them does not suffice.”
@PlayNowWorkLater
4 ай бұрын
Cool! Great visuals
@BD-bditw
2 жыл бұрын
Excellent animation. (Can anyone explain why the eskers in Ireland run east-west when the ice sheet of the ice age flowed north to south? Major roads in Ireland, such as from Dublin to Galway are built on top of the eskers.) Searched for an answer but no luck yet.)
@Geodoxa
2 жыл бұрын
Hi J P. For your answer, read to the end. This animation illustrates the sheet flow theory of drumlin formation by sediment deposition. After the sheet flow receded, the residual water is channeled into ice tunnels which results in eskers formation. So, the drumlins are not crossing the eskers but the opposite; the eskers cross the drumlins by trunking them or going up and down these hills. Such chronology (1-drumlins; 2- eskers) supports the sheet flood theory. We observe the same sequence for the whole of North America. Moreover, between stage 1 and stage 2 there are large channels (phase 1b) carving the drumlins Many eskers are found in these large channels. Those 3 phases support well the flood model. Other drumlin models do not explain this sequence. For your question: the orientation of the Ireland eskers is an expression of the natural way the residual water escapes the base of the ice sheet; usually where the glacier margin is least attached (sealed) to the bedrock. The slope + hydraulic head are more factors in the water escape process. The drumlins' orientation is an expression of the flood direction.
@manwahng8142
2 жыл бұрын
@@Geodoxa Halo form Hong Kong, can a Dublin still be formed without a more resistant bed rock😳😳🙏🏻🙏🏻? How can the debris left on the downside without having obstruction on stoss-side🤔🤔🙏🏻🙏🏻tell me plz I rly wanna know🙏🏻🙏🏻🙏🏻🙏🏻
@Geodoxa
2 жыл бұрын
@@manwahng8142 Hello Wah ng, that is a very good question. First, the process is alike the ones of dunes or anti-dunes in wind and water flow. Because no one had observed this, I build a flume lab to experiment and test the model. Not an easy challenge. The relief in the bedrock might trigger a drumlin. Some ice age geologists had noticed such occurrences of drumlins related to a bump in the bedrock. But most of the time the bedrock under the drumlins is quite flat with just a soft relief. Moreover, the drumlins are distributed independently of the bedrock with a self-organized pattern like dunes and flutes in the sedimentary process. We believe that the sediment accumulation on the stoss-side forces the flow to erode easily the ice roof above, so to answer your question there is no obstruction on the lee and stoss-side. It is like the flow along the upper profile of an airplane wing. So far we have no analogy on earth today. The relief produced in the moraine during Jokullup (flash flood) in Iceland is not similar enough to give a proper explanation of the vast drumlins field of Canada.
@skrishnankrishnan8643
2 жыл бұрын
Excellent presentation
@achwitgaur8865
Жыл бұрын
That's great
@cobyiv
Жыл бұрын
Incredible
@latetotheparty184
Жыл бұрын
This is not clear to me. C'mon a little narration or sub titles would help! What are these rocks doing in the blue area. Are they just kind of hanging out mid air?
@Geodoxa
Жыл бұрын
In the context of drumlins, it is obvious that the blue roof is the ice, and de blocs are the basal moraines inserted at the base of the glacier. The animation was addressed to glaciologists for a future documentary. This animation was finalized after long exchanges with the concerned glaciologists. Sorry for the lack of comments... this is for later videos.
@latetotheparty184
Жыл бұрын
@@Geodoxa And there is a fast moving river under the glacier? I still do not get it. I thought drumlins were left by big floods.
@JovoShort
2 жыл бұрын
Best video!!!
@michelleishappy4036
Жыл бұрын
Some details would help...
@priyanshisingh3510
2 жыл бұрын
Thank you
@PaulHummerman
3 жыл бұрын
needs an explanation
@sijianil6172
3 жыл бұрын
Very nice
@pravithapv2107
2 жыл бұрын
👍🏻👍🏻🥰🥰
@dunnkruger8825
2 жыл бұрын
Thanks
@frgmnt3185
3 жыл бұрын
hello
@abhijeetbhattacharya4285
11 ай бұрын
Esker....
@elpepe4445
4 жыл бұрын
This is not correct!
@kellyofearth2092
4 жыл бұрын
would you care to elaborate?
@notanyone4733
3 жыл бұрын
@@kellyofearth2092 haha silence from for a year and no reply, guess he chickened out
@changriangyangfo7919
8 ай бұрын
Dumblin can be of many types but the process remains always same
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